CVE-2025-55221CWE-306

CVE-2025-55221

High · published December 1, 2025

CVSS v3.1
8.6
EPSS
0%
Percentile
35.1
In the wild
Unconfirmed
What it is

🚨 A rogue packet is all it takes! This denial of service vulnerability in Socomec DIRIS Digiware M-70 can be triggered by sending a crafted Modbus TCP packet on port 502, no authentication required! ⚡ Think of it like a sneaky prankster throwing a well-aimed balloon filled with water at a power box — a simple throw can cause an entire electrical outage, disrupting service for everyone connected. If an attacker successfully sends this malicious packet, they can bring down the device, leading to downtime and disruption of services. This could mean a significant impact on operations and data flow, especially in critical environments — absolutely devastating!

Put simply

Think of it like a sneaky prankster throwing a well-aimed balloon filled with water at a power box — a simple throw can cause an entire electrical outage, disrupting service for everyone connected. This vulnerability exists in the Modbus TCP and Modbus RTU over TCP USB Function functionality, allowing an unauthenticated attacker to send a specially crafted packet that triggers a denial of service condition.

What to do

If an attacker successfully sends this malicious packet, they can bring down the device, leading to downtime and disruption of services. This could mean a significant impact on operations and data flow, especially in critical environments — absolutely devastating! To protect against this, update to version 1.6.10 or later of the Socomec DIRIS Digiware M-70 firmware. Additionally, consider firewall rules to restrict access to port 502 from untrusted sources. Don't delay — patch immediately! You've got this! With these steps, you can fortify your defenses and keep your systems safe! 🛡️

The record
Technical detail
CVSS v3.1
8.6 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00419 · 35.1th percentile
Weakness
CWE-306 · Missing Authentication for Critical Function
Published
2025-12-01T21:15Z
Affected products (1)
ProductVersionsFixed in
socomec/diris_m-70_firmwareall versions—
References (1)
EPSS history
Timeline
  • 01 DEC 15:25Z
    A denial of service vulnerability exists in the Modbus TCP and Modbus RTU over TCP USB Function functionality of Socomec DIRIS Digiware M-70 1.6.9
    cvelistv5